<title>香甜的黄油</title><link href="http://hzoi.com/tomorrow.css" rel="stylesheet"><div class="ui existing segment"><pre><code><span class="pl-cp">#include</span><span class="pl-cpf">&lt;cstdio&gt;</span><span class="pl-cp"></span>
<span class="pl-cp">#include</span><span class="pl-cpf">&lt;cstring&gt;</span><span class="pl-cp"></span>
<span class="pl-cp">#include</span><span class="pl-cpf">&lt;algorithm&gt;</span><span class="pl-cp"></span>
<span class="pl-cp">#define MAXN 505</span>
<span class="pl-cp">#define MAXP 805</span>
<span class="pl-cp">#define INF 0x7fffffff</span>
<span class="pl-k">using</span> <span class="pl-k">namespace</span> <span class="pl-n">std</span><span class="pl-p">;</span>
<span class="pl-kt">int</span> <span class="pl-n">map</span><span class="pl-p">[</span><span class="pl-n">MAXP</span><span class="pl-p">][</span><span class="pl-n">MAXP</span><span class="pl-p">];</span>
<span class="pl-kt">int</span> <span class="pl-n">n</span><span class="pl-p">,</span><span class="pl-n">p</span><span class="pl-p">,</span><span class="pl-n">c</span><span class="pl-p">;</span>
<span class="pl-kt">int</span> <span class="pl-n">cows</span><span class="pl-p">[</span><span class="pl-n">MAXN</span><span class="pl-p">];</span>
<span class="pl-kt">int</span> <span class="pl-nf">main</span><span class="pl-p">(){</span>
    <span class="pl-n">memset</span><span class="pl-p">(</span><span class="pl-n">map</span><span class="pl-p">,</span><span class="pl-mh">0x3f</span><span class="pl-p">,</span><span class="pl-k">sizeof</span><span class="pl-p">(</span><span class="pl-n">map</span><span class="pl-p">));</span>
    <span class="pl-n">scanf</span><span class="pl-p">(</span><span class="pl-s">&quot;%d%d%d&quot;</span><span class="pl-p">,</span><span class="pl-o">&amp;</span><span class="pl-n">n</span><span class="pl-p">,</span><span class="pl-o">&amp;</span><span class="pl-n">p</span><span class="pl-p">,</span><span class="pl-o">&amp;</span><span class="pl-n">c</span><span class="pl-p">);</span>
    <span class="pl-k">for</span><span class="pl-p">(</span><span class="pl-kt">int</span> <span class="pl-n">i</span><span class="pl-o">=</span><span class="pl-mi">1</span><span class="pl-p">;</span><span class="pl-n">i</span><span class="pl-o">&lt;=</span><span class="pl-n">p</span><span class="pl-p">;</span><span class="pl-n">i</span><span class="pl-o">++</span><span class="pl-p">)</span><span class="pl-n">map</span><span class="pl-p">[</span><span class="pl-n">i</span><span class="pl-p">][</span><span class="pl-n">i</span><span class="pl-p">]</span><span class="pl-o">=</span><span class="pl-mi">0</span><span class="pl-p">;</span>
    <span class="pl-k">for</span><span class="pl-p">(</span><span class="pl-kt">int</span> <span class="pl-n">i</span><span class="pl-o">=</span><span class="pl-mi">1</span><span class="pl-p">;</span><span class="pl-n">i</span><span class="pl-o">&lt;=</span><span class="pl-n">n</span><span class="pl-p">;</span><span class="pl-n">i</span><span class="pl-o">++</span><span class="pl-p">){</span>
        <span class="pl-n">scanf</span><span class="pl-p">(</span><span class="pl-s">&quot;%d&quot;</span><span class="pl-p">,</span><span class="pl-o">&amp;</span><span class="pl-n">cows</span><span class="pl-p">[</span><span class="pl-n">i</span><span class="pl-p">]);</span>
    <span class="pl-p">}</span>
    <span class="pl-kt">int</span> <span class="pl-n">a</span><span class="pl-p">,</span><span class="pl-n">b</span><span class="pl-p">,</span><span class="pl-n">w</span><span class="pl-p">;</span>
    <span class="pl-k">for</span><span class="pl-p">(</span><span class="pl-kt">int</span> <span class="pl-n">i</span><span class="pl-o">=</span><span class="pl-mi">1</span><span class="pl-p">;</span><span class="pl-n">i</span><span class="pl-o">&lt;=</span><span class="pl-n">c</span><span class="pl-p">;</span><span class="pl-n">i</span><span class="pl-o">++</span><span class="pl-p">){</span>
        <span class="pl-n">scanf</span><span class="pl-p">(</span><span class="pl-s">&quot;%d%d%d&quot;</span><span class="pl-p">,</span><span class="pl-o">&amp;</span><span class="pl-n">a</span><span class="pl-p">,</span><span class="pl-o">&amp;</span><span class="pl-n">b</span><span class="pl-p">,</span><span class="pl-o">&amp;</span><span class="pl-n">w</span><span class="pl-p">);</span>
        <span class="pl-n">map</span><span class="pl-p">[</span><span class="pl-n">a</span><span class="pl-p">][</span><span class="pl-n">b</span><span class="pl-p">]</span><span class="pl-o">=</span><span class="pl-n">map</span><span class="pl-p">[</span><span class="pl-n">b</span><span class="pl-p">][</span><span class="pl-n">a</span><span class="pl-p">]</span><span class="pl-o">=</span><span class="pl-n">w</span><span class="pl-p">;</span>
    <span class="pl-p">}</span>
    <span class="pl-k">for</span><span class="pl-p">(</span><span class="pl-kt">int</span> <span class="pl-n">k</span><span class="pl-o">=</span><span class="pl-mi">1</span><span class="pl-p">;</span><span class="pl-n">k</span><span class="pl-o">&lt;=</span><span class="pl-n">p</span><span class="pl-p">;</span><span class="pl-n">k</span><span class="pl-o">++</span><span class="pl-p">){</span>
        <span class="pl-k">for</span><span class="pl-p">(</span><span class="pl-kt">int</span> <span class="pl-n">i</span><span class="pl-o">=</span><span class="pl-mi">1</span><span class="pl-p">;</span><span class="pl-n">i</span><span class="pl-o">&lt;=</span><span class="pl-n">p</span><span class="pl-p">;</span><span class="pl-n">i</span><span class="pl-o">++</span><span class="pl-p">){</span>
            <span class="pl-k">for</span><span class="pl-p">(</span><span class="pl-kt">int</span> <span class="pl-n">j</span><span class="pl-o">=</span><span class="pl-mi">1</span><span class="pl-p">;</span><span class="pl-n">j</span><span class="pl-o">&lt;=</span><span class="pl-n">p</span><span class="pl-p">;</span><span class="pl-n">j</span><span class="pl-o">++</span><span class="pl-p">){</span>
                <span class="pl-n">map</span><span class="pl-p">[</span><span class="pl-n">i</span><span class="pl-p">][</span><span class="pl-n">j</span><span class="pl-p">]</span><span class="pl-o">=</span><span class="pl-n">min</span><span class="pl-p">(</span><span class="pl-n">map</span><span class="pl-p">[</span><span class="pl-n">i</span><span class="pl-p">][</span><span class="pl-n">j</span><span class="pl-p">],</span><span class="pl-n">map</span><span class="pl-p">[</span><span class="pl-n">i</span><span class="pl-p">][</span><span class="pl-n">k</span><span class="pl-p">]</span><span class="pl-o">+</span><span class="pl-n">map</span><span class="pl-p">[</span><span class="pl-n">k</span><span class="pl-p">][</span><span class="pl-n">j</span><span class="pl-p">]);</span>
            <span class="pl-p">}</span>
        <span class="pl-p">}</span>
    <span class="pl-p">}</span>
    <span class="pl-kt">int</span> <span class="pl-n">minsum</span><span class="pl-o">=</span><span class="pl-n">INF</span><span class="pl-p">;</span>
    <span class="pl-k">for</span><span class="pl-p">(</span><span class="pl-kt">int</span> <span class="pl-n">i</span><span class="pl-o">=</span><span class="pl-mi">1</span><span class="pl-p">;</span><span class="pl-n">i</span><span class="pl-o">&lt;=</span><span class="pl-n">p</span><span class="pl-p">;</span><span class="pl-n">i</span><span class="pl-o">++</span><span class="pl-p">){</span>
        <span class="pl-kt">int</span> <span class="pl-n">sum</span><span class="pl-o">=</span><span class="pl-mi">0</span><span class="pl-p">;</span>
        <span class="pl-k">for</span><span class="pl-p">(</span><span class="pl-kt">int</span> <span class="pl-n">j</span><span class="pl-o">=</span><span class="pl-mi">1</span><span class="pl-p">;</span><span class="pl-n">j</span><span class="pl-o">&lt;=</span><span class="pl-n">n</span><span class="pl-p">;</span><span class="pl-n">j</span><span class="pl-o">++</span><span class="pl-p">){</span>
            <span class="pl-n">sum</span><span class="pl-o">+=</span><span class="pl-n">map</span><span class="pl-p">[</span><span class="pl-n">i</span><span class="pl-p">][</span><span class="pl-n">cows</span><span class="pl-p">[</span><span class="pl-n">j</span><span class="pl-p">]];</span>
        <span class="pl-p">}</span>
        <span class="pl-n">minsum</span><span class="pl-o">=</span><span class="pl-n">min</span><span class="pl-p">(</span><span class="pl-n">minsum</span><span class="pl-p">,</span><span class="pl-n">sum</span><span class="pl-p">);</span>
    <span class="pl-p">}</span>
    <span class="pl-n">printf</span><span class="pl-p">(</span><span class="pl-s">&quot;%d&quot;</span><span class="pl-p">,</span><span class="pl-n">minsum</span><span class="pl-p">);</span>
<span class="pl-p">}</span>
</cpde></pre></div>